Function pair
pub fn pair<T, AccountId>()where
    T: Balanced<AccountId>,
    <T as Inspect<AccountId>>::Balance: AtLeast8BitUnsigned + Debug,
    AccountId: AtLeast8BitUnsigned,Expand description
Tests Balanced::pair.
pub fn pair<T, AccountId>()where
    T: Balanced<AccountId>,
    <T as Inspect<AccountId>>::Balance: AtLeast8BitUnsigned + Debug,
    AccountId: AtLeast8BitUnsigned,Tests Balanced::pair.